OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 17 shown for “Pontefract Castle (Yorkshire), Charles II” — 46 records examined, 22 dropped by the rights gate.
Archives queried 2026-09-03 00:38 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Pontefract Castle (Yorkshire), Charles II
Artist not stated in the record · 1648/49
Pterygoneurum cavifolium (Ehrh. & Fürnr.) Jur.
Artist not stated in the record · 1854
Two Children Teasing a Cat
Annibale Carracci
Didymodon spadiceus (Mitt.) Limpr.
Artist not stated in the record · 6 Nov 1857
Juan de Pareja (ca. 1608–1670)
Velázquez (Diego Rodríguez de Silva y Velázquez) · 1650
Ditrichum pusillum (Hedw.) Hampe
Artist not stated in the record · Transcribed d/m/y: /9/54
Armor Garniture of George Clifford (1558–1605), Third Earl of Cumberland
Jacob Halder · 1586
Tortula marginata (Bruch & Schimp.) Spruce
Artist not stated in the record · 1845
Left Gauntlet of Henry (1594–1612), Prince of Wales
Jacob Halder · ca. 1608
Campylopus pyriformis (Schultz) Brid.
Artist not stated in the record · 1842
Pogonatum subrotundum Lindb.
Artist not stated in the record · Transcribed d/m/y: /10/46
Dicranella heteromalla (Hedw.) Schimp.
Artist not stated in the record · Transcribed d/m/y: /9/54
Barbula unguiculata Hedw.
Artist not stated in the record · Transcribed d/m/y: /1/46
Bryum intermedium (Brid.) Blandow
Artist not stated in the record
Ditrichum pusillum (Hedw.) Hampe
Artist not stated in the record · 8 Apr 1847
Encalypta vulgaris Hedw.
Artist not stated in the record · Feb 1854
Pottia lanceolata R.H. Zander
Artist not stated in the record · Feb 1853
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 6 matched · 6 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.6 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 11050 matched · 40 examined · 22 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-09-03 00:38 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.